The multifunctional Olaplex N°9 Bond Protector serum is packed with antioxidants that neutralize free radicals, act as a pollution shield, and protect hair from breakage and heat styling. Thanks to patented Olaplex® technology, it repairs hair from the inside out. Red algae extract blocks pollutants, nourishes the hair, and delivers powerful antioxidants to the cuticle that neutralize free radicals before they cause damage. N°9 Bond Protector provides immediate results for all hair types and works on all types of damage.